Any Martian life might be from Earth

[Perspicuo]

Well this sucks...

Dinosaur Asteroid May Have Sent Life Into Space
http://www.history.com/news/dinosaur-asteroid-may-have-sent-life-into-space

Around 65 million years ago, a giant space rock believed to be some six miles across hit Earth near the town of Chicxulub, Mexico, blasting a crater more than 110 miles wide. The impact is believed to have released as much energy as 100 trillion tons of TNT, more than 1 billion times the power of the atom bombs dropped on Hiroshima and Nagasaki during World War II. Over the last few decades, many have come to believe that the Chicxulub impact caused the extinction of the dinosaurs, along with some 75 percent of all species on Earth. Now, a group of U.S. researchers say that the impact may also have catapulted large chunks of Earth--big enough to shelter living organisms--as far as Europa, an icy moon of Jupiter located some 485 million miles from the sun.

Contamination of the evidence. Now it will be much harder to prove native Martian life, even if we do find life on the planet.

 

[Clivedurdle]

No, DHA will show clearly what if anything it is related to - if it is DNA based!

 

[Atheos]

Panspermia theories have been around for a long time. Finding evidence of (even extinct) DNA based life on Mars would neither confirm nor deny such theories.